What a colossal PITA... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ogier · 06-23-2005, 12:16 AM

Ok, here was the issue:

69 Chev with a transplanted 472 caddy motor in it. Runs great more filling.

Over heats. Average temp running down the highway was around 230-240.

When I put it in the truck, I didn't shove the engine back to the firewall. I left about an inch and a half for clearence.

I was not able to run the factory clutch fan.

Also, Oil pressure starts at around 40PSI and drops to zilch when it is really hot.

Solution:

Two days and lots of sweat later, I shoved the engine back one inch and took the non-clutched fan and mounting spacer from the 77 that I just got and after milling the spacer down 5/8 of an inch, installed it and removed the electric fan that I had in there.

Now Temp stays at 185 regardless of driving conditions.

Oil pressure starts still at 40PSI but only drops to about 23PSI at temp(I think the bypass spring may need replacing...

Problem solved. What a PITA....

milehightoyz · 06-23-2005, 12:39 AM

couldve been alot worse, seems like you did alright. good job!

GMC AMI · 06-23-2005, 05:58 AM

Quote:

Originally Posted by Ogier

Ok, here was the issue:

69 Chev with a transplanted 472 caddy motor in it. Runs great more filling.

Over heats. Average temp running down the highway was around 230-240.

When I put it in the truck, I didn't shove the engine back to the firewall. I left about an inch and a half for clearence.

I was not able to run the factory clutch fan.

Also, Oil pressure starts at around 40PSI and drops to zilch when it is really hot.

Solution:

Two days and lots of sweat later, I shoved the engine back one inch and took the non-clutched fan and mounting spacer from the 77 that I just got and after milling the spacer down 5/8 of an inch, installed it and removed the electric fan that I had in there.

Now Temp stays at 185 regardless of driving conditions.

Oil pressure starts still at 40PSI but only drops to about 23PSI at temp(I think the bypass spring may need replacing...

Problem solved. What a PITA....

Caddy main bearings are worn down and have too much clearance, very common in these motors.

Tighter when new than Chevy bearing clearance.

**special-K** · 06-23-2005, 06:38 AM

Swapping motors can cause PsITA.You`re doing good now.

06-23-2005, 12:16 AM	#1
Ogier Chopper/Painter Join Date: Jul 2004 Location: Medford, Or. Posts: 284	What a colossal PITA... Ok, here was the issue: 69 Chev with a transplanted 472 caddy motor in it. Runs great more filling. Over heats. Average temp running down the highway was around 230-240. When I put it in the truck, I didn't shove the engine back to the firewall. I left about an inch and a half for clearence. I was not able to run the factory clutch fan. Also, Oil pressure starts at around 40PSI and drops to zilch when it is really hot. Solution: Two days and lots of sweat later, I shoved the engine back one inch and took the non-clutched fan and mounting spacer from the 77 that I just got and after milling the spacer down 5/8 of an inch, installed it and removed the electric fan that I had in there. Now Temp stays at 185 regardless of driving conditions. Oil pressure starts still at 40PSI but only drops to about 23PSI at temp(I think the bypass spring may need replacing... Problem solved. What a PITA.... __________________ With regards, Ogier 1969 Chevrolet C20 - Resto-Custom started!!!

06-23-2005, 06:38 AM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Swapping motors can cause PsITA.You`re doing good now. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

06-23-2005, 12:39 AM	#2
milehightoyz AttentionDeficitDisorder Join Date: Mar 2005 Location: COLORADO Posts: 600	couldve been alot worse, seems like you did alright. good job!



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